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Subtract 21/30 from 7/4

1st number: 1 3/4, 2nd number: 21/30

7/4 - 21/30 is 21/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 30 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 4 × 15 = 60,
    7/4 = 7 × 15/4 × 15 = 105/60
  3. Likewise, for the 2nd fraction, since 30 × 2 = 60,
    21/30 = 21 × 2/30 × 2 = 42/60
  4. Subtract the two like fractions:
    105/60 - 42/60 = 105 - 42/60 = 63/60
  5. After reducing the fraction, the answer is 21/20
  6. In mixed form: 11/20

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